215064 has 48 divisors (see below), whose sum is σ = 608400. Its totient is φ = 68544.

The previous prime is 215063. The next prime is 215077. The reversal of 215064 is 460512.

215064 = T₁₀₇ + T₁₀₈ + ... + T₁₃₅.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2037 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (12675).

2²¹⁵⁰⁶⁴ is an apocalyptic number.

215064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304200).

215064 is an abundant number, since it is smaller than the sum of its proper divisors (393336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215064 is a wasteful number, since it uses less digits than its factorization.

215064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215064 is about 463.7499326146. The cubic root of 215064 is about 59.9132078459.

Adding to 215064 its reverse (460512), we get a palindrome (675576).

The spelling of 215064 in words is "two hundred fifteen thousand, sixty-four".